How do I change the ISPConfig Website IP, not the server IP?

Hi, lots of info on changing your server IP along with the website admin interface, but can't find how to change the website control panel IP only.

Here's the dumb thing I did:

My server IP is 192.168.0.113

I did the setup for ISPConfig 2 on Centos 5.3 and when it asked for the IP of the ISPConfig web interface, I said 192.168.0.213 instead of 192.168.0.113. Stupid. Got my servers confused. Where is this setting stored?